02-18
Protective function
Detect device
Operation
High pressure
protection 1
High
pressure
sensor
High
pressure
sensor
Cool
Heat
High pressure
protection 2
High
pressure
sensor
Display
Abnormal high
pressure
protection
control
High Pressure
Protection Stop 1
High
pressure
sensor
High
pressure
switch
High pressure
protection stop 2
P2
EA41
EA42
P2
2-9-2 High pressure protection
Above 573psi (3.94MPa) 60 sec. elapsed and
Below 538psi (3.70MPa)
SV2 =>ON
Pattern 1
Above 495 (539)* psi
(3.40 (3.70)* MPa)
Pattern 2
Above 509 (553)*psi
(3.50 (3.80)* MPa)
60 sec. elapsed and
Below 471 (515)*psi
(3.24 (3.54)* MPa)
180 sec. elapsed and
Below 486 (530)*psi
(3.34 (3.64)* Mpa)
SV2 =>ON
SV1, SV2 =>ON
Pattern 1
Cooling/Cooling Main:
Above 550psi (3.78MPa)
25 sec. elapsed and
Below 538 psi
(3.70Mpa)
Compressor rotation speed
rise up prohibit
Heating /Heating Main:
Above 471(515)*psi
(3.24 (3.54)* MPa)
Pattern 2
Cooling/Cooling Main:
Above 567psi (3.90MPa)
Heating /Heating Main:
Above 480(524)*psi
(3.30 (3.60)* Mpa)
25 sec. elapsed and
Below 464(508)*psi
(3.19 (3.49)* Mpa)
25 sec. elapsed and
Below 550psi (3.78MPa)
25 sec. elapsed and
below 3.24(3.54)* MPa
Compressor rotation speed
degrease - 18.5 rps (-15.0 rps)
every30 sec. until cancel
condition.
( ): L-Chassis
*The value in ( ) , when the compressor is operating more than 30Hz.
Pattern 1
Above 582psi (4.00MPa)
5 minutes elapsed and
Below 501psi (3.50MPa)
Corresponding outdoor unit
stops
Pattern 2
Pattern 1 generated 3
times within 60 minutes
10minutes elapsed and
below 501psi (3.50MPa)
Corresponding outdoor unit
stops & Error display
Start condition Release condition
Pattern 1
Pressure SW operate
(More than 611psi (4.20
MPa) detects)
5 minutes elapsed and
pressure SW reset
466psi (3.2MPa)
Corresponding outdoor unit
stops
Pattern 2
Pattern 1 generated
3 times within 60
minutes
10 minutes elapsed and
pressure SW reset
466psi (3.2MPa)
Corresponding outdoor unit
stops & Error display
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